AnatomyOrganismsDiseasesChemicals and DrugsAnalytical, Diagnostic and Therapeutic Techniques and EquipmentPsychiatry and PsychologyPhenomena and ProcessesDisciplines and OccupationsTechnology, Industry, AgricultureInformation ScienceHealth Care
PhotonsTomography, Emission-Computed, Single-PhotonTomography, X-Ray ComputedTomography, Emission-ComputedPositron-Emission TomographyTomographyOrganotechnetium CompoundsRadiopharmaceuticalsTechnetium Tc 99m ExametazimeThallium RadioisotopesOximesTomography, Optical CoherenceIofetamineTechnetiumFluorodeoxyglucose F18Iodine RadioisotopesTomography, OpticalCerebrovascular CirculationTomography, Spiral ComputedBrainTechnetium Tc 99m SestamibiIodobenzenesThalliumSensitivity and SpecificityXenon RadioisotopesMultidetector Computed TomographyPhantoms, ImagingMagnetic Resonance ImagingTechnetium Tc 99m PyrophosphateImage Processing, Computer-AssistedDiagnostic ImagingMultimodal ImagingCone-Beam Computed TomographyElectron Microscope TomographyTropanesOtoacoustic Emissions, SpontaneousAmphetaminesReproducibility of ResultsMyocardial Perfusion ImagingCardiac-Gated Single-Photon Emission Computer-Assisted TomographyTomography, X-RayFluorine RadioisotopesHeartTime FactorsImaging, Three-DimensionalPredictive Value of TestsRadioisotopesRadiationAcetazolamideLightTomography Scanners, X-Ray ComputedOrganometallic CompoundsRadiation DosageVehicle EmissionsOrganophosphorus CompoundsImage EnhancementGamma RaysRadioactive TracersScattering, RadiationGamma CamerasRadionuclide ImagingRetinal Rod Photoreceptor CellsExercise TestMolecular ImagingEquipment DesignMonte Carlo MethodSpectrometry, FluorescenceDopamine Plasma Membrane Transport ProteinsSpectrometry, GammaCarbon RadioisotopesIndium RadioisotopesAlgorithmsFrontal LobeCinanserinTissue DistributionCoronary AngiographyNitrogen RadioisotopesTechnetium Tc 99m MedronateTechnology, RadiologicRegional Blood FlowRadiusThalamic DiseasesGallium RadioisotopesNortropanesFlumazenilDipyridamoleVision, OcularModels, StructuralContrast MediaRadiometryRhodopsinCerebral RevascularizationCoronary CirculationRetrospective StudiesProspective StudiesTreatment OutcomeSpondylolysisFluorescent DyesDominance, CerebralTissue Survival
Myocardial perfusionNuclearRaysRadionuclideCadmium zinc tellDetectorsPlanarCoronaryDecaysDetectionEmitsModalitiesPositron emissionScanDiagnosticPenetrate tissueUltrasoundCameraIsotopesDimerPhysiologicalForm of ionising electromagnetic99mTcProbeSensitivitySPECT-CTDecayTracerImagingDetectorRadioactive isotopeClearanceClinical routineEnergyVivoImagesTestPatientsCamerasTechnologyEnergeticShowMedicalProcesses
Myocardial perfusion2
Nuclear15
Rays31
  • Transmission imaging occurs when radiation is directed through a patient and onto a radiation detector, such as when using X-rays in X-ray imaging (XR) or Computed Tomography imaging (CT). (justia.com)
  • In both transmission and emission imaging, the detectors used are selected based on their sensitivity to high energy photons of a certain energy which are used by that imaging modality, such as X-rays used in XR and CT (80-120 keV), or gamma rays used in SPECT (140 keV) or PET (511 keV). (justia.com)
  • It is well suited to the role because it emits readily detectable 140 keV gamma rays (these are about the same wavelength emitted by conventional X-ray diagnostic equipment), and its half-life for gamma emission is 6.01 hours (meaning that about fifteen sixteenths (93.7%) of it decays to 99 Tc in 24 hours). (chemeurope.com)
  • Technetium-99 is an isotope which emits soft beta rays but no gamma rays. (chemeurope.com)
  • In the use of technetium-99m, the radioisotope is administered to the patient and the escaping gamma rays are incident upon a gamma camera which computes and calculates the image. (chemeurope.com)
  • Gamma rays are also used to sterilise medical equipment as well as treat cancer and tumours. (businessresearchinsights.com)
  • Particle accelerators use gamma rays as an external beam. (businessresearchinsights.com)
  • This tracer accumulates in the area of the body being examined, where it gives off gamma rays which can then be detected by the gamma camera. (synrad.com.au)
  • This will emit gamma rays and will get picked up by the gamma camera to construct images. (synrad.com.au)
  • A SPECT scan is a medical imaging test that uses gamma rays to create cross-sectional pictures of the body. (kiranpetct.com)
  • PET (positron emission tomography) and SPECT (single-photon emission computed tomography) rely on detection of gamma rays emitted during or following the decay of a radiotracer. (drugtargetreview.com)
  • What is gamma rays? (skyheadlines.com)
  • What are gamma rays and its uses? (skyheadlines.com)
  • Gamma rays are a type of electromagnetic radiation that possess high energy, high frequency, and short wavelengths. (skyheadlines.com)
  • Gamma rays have a multitude of uses across different fields. (skyheadlines.com)
  • Are gamma rays safe for humans? (skyheadlines.com)
  • Gamma rays are not inherently safe for humans and can be harmful if one is exposed to high doses or for extended periods. (skyheadlines.com)
  • This is why protective measures are essential when working with or near gamma rays. (skyheadlines.com)
  • What is the simple definition of gamma rays? (skyheadlines.com)
  • Gamma rays are high-energy light waves that are part of the electromagnetic spectrum. (skyheadlines.com)
  • Why is gamma called rays? (skyheadlines.com)
  • Initially, the behavior of these high-energy emissions was not fully understood, and they were observed to travel in straight lines, much like rays of light. (skyheadlines.com)
  • Thus, they were termed "gamma rays," following the naming conventions set for alpha and beta radiation, which were discovered earlier. (skyheadlines.com)
  • In terms of energy, gamma rays can vary from thousands to millions of electronvolts (keV to MeV), categorizing them at the high-energy end of the electromagnetic spectrum . (skyheadlines.com)
  • Gamma rays stand out as extremely high-frequency electromagnetic waves, having wavelengths in the picometer range. (skyheadlines.com)
  • Unlike other types of electromagnetic radiation, gamma rays are uncharged. (skyheadlines.com)
  • However, this ionizing ability of gamma rays is also leveraged in medical treatments, such as radiation therapy for cancer. (skyheadlines.com)
  • When gamma rays do come into contact with matter, they generally interact through one of three mechanisms: the photoelectric effect, Compton scattering, or pair production. (skyheadlines.com)
  • Gamma rays serve as crucial messengers from extreme environments in the universe. (skyheadlines.com)
  • The detected photons were classified into direct rays, scattered rays, penetrating rays, and characteristic X-rays from lead. (elsevierpure.com)
  • After travelling at most a few millimetres, a positron will collide with an electron, simultaneously releasing two gamma rays (photons) with an energy of 511 keV into opposite directions. (lu.se)
Radionuclide4
  • Positron Emission Tomography (PET) Positron emission tomography (PET) is a type of radionuclide scanning. (msdmanuals.com)
  • When radionuclide decay it gives off gamma ray. (modernloveok.com)
  • Imaging of the radiation emitted from the radionuclide of the radiopharmaceutical is carried out using a gamma camera (planar or SPECT- Single Photon Emission Computed Tomography) or PET (Positron Emission Tomography). (lu.se)
  • The radiotracer accumulates in the tissue to be studied, and its radionuclide decays by emission of a positron (anti-electron). (lu.se)
Cadmium zinc tell1
  • BACKGROUND: A novel semiconductor cadmium zinc telluride (CZT) gamma camera system using a block sequential regularized expectation maximization (BSREM) reconstruction algorithm is now clinically available. (lu.se)
Detectors6
  • The detectors then pick up the positron emission, forming the image (Bontrager, Lampignano, & Kendrick, 2018).The most common radiopharmaceutical substance used is technetium-99cm (99mTc). (modernloveok.com)
  • These interactions involving gamma radiation can be used in diverse applications, from medical imaging to constructing radiation detectors. (skyheadlines.com)
  • Many other NASA applications benefit from the innovation, such as reading out individual pixels of APD arrays, including single-photon avalanche-photodiode detectors and sensor signal-processing nodes. (nasa.gov)
  • These two photons are detected by the PET camera and simultaneously localized within a fixed period of time by a series of opposing detectors, which correspond to multiple rings of scintillation crystals. (lu.se)
  • Gamma-ray photons emitted from the internal distributed radiopharmaceutical penetrate through the animal's or patient's body and are detected by a single or a set of collimated radiation detectors. (lu.se)
  • Most of the detectors used in current SPECT systems are based on a single or multiple NaI (TI) scintillation detectors. (lu.se)
Planar2
  • METHOD: Seventy-six patients (bone-, cardiac- and lung scan) were scanned on a conventional gamma camera (planar and/or single-photon emission computed tomography [SPECT]/SPECT-CT) used in clinical routine and on the ring-configurated CZT camera Starguide (GE Healthcare). (lu.se)
  • The database includes, but is not limited to, agents developed for positron emission tomography (PET), single photon emission computed tomography (SPECT), magnetic resonance imaging (MRI), ultrasound (US), computed tomography (CT), optical imaging, planar radiography, and planar gamma imaging. (freebookcentre.net)
Coronary2
  • Cardiac computed tomography (CCT) can measure the density and extent of calcifications in coronary artery walls. (medscape.com)
  • Coronary computed tomographic angiography (CCTA) allows direct visualization of the coronary artery lumen, similar to traditional angiography. (medscape.com)
Decays3
  • 11C decays by positron emission with a half-life of ca. 20 min. (wikipedia.org)
  • 15O decays by positron emission with a half-life of 122 sec. (wikipedia.org)
  • This detector has the ability to record only the photons of low energy that have traversed the coded aperture holes while rejecting higher energy photons from the radioactive decays. (ca.gov)
Detection3
  • The company develops Manocept platform to target the CD206 mannose receptor expressed on activated macrophages for a range of diagnostic modalities, including single photon emission computed tomography, positron emission tomography (PET), gamma-scanning, and intra-operative and/or optical-fluorescence detection, as well as delivery of therapeutic compounds that target macrophages, and immune-and inflammation-involved diseases. (defenseworld.net)
  • Positron emission tomography linked to a computed tomography scan with digital detection, which allows greater sensitivity and improved detectability of small lesions (compared to most PET scanners currently in use), with faster results and smaller radiopharmaceutical doses. (ivo.es)
  • While 18F-fluorodeoxyglucose positron emission tomography with computed tomography (18FDG-PET/CT) shows promise for preoperative LNM detection, its specificity is low. (bvsalud.org)
Emits1
  • SPECT images are acquired after administration of a radioactive compound that emits single photons that can be detected by gamma-cameras. (cambridge.org)
Modalities1
  • These imaging modalities typically utilize collimators to help assure that the photons received by the detector are from within a known incidence angle with respect to the detector surface. (justia.com)
Positron emission9
  • 11C is one of the isotopes often used in positron emission tomography. (wikipedia.org)
  • Scanners include the basic gamma camera, single photon emission computed tomography (SPECT) or positron emission tomography (PET). (sutterhealth.org)
  • Emission imaging occurs when radiation in the form of a radiopharmaceutical is injected into a patient (or ingested or inhaled by the patient) and radioactive particles are emitted by the patient's body, such as when gamma photons are emitted and detected in Single Photon Emission Computed Tomography (SPECT) or Positron Emission Tomography (PET). (justia.com)
  • Therefore, the use of techniques like computed tomography (CT), positron emission tomography (PET) or single photon emission computed tomography (SPECT) became more frequent when conducting preclinical studies in animal models. (researchsquare.com)
  • Single photon emission computed tomography (SPECT) and positron emission tomography (PET) are among the earliest developed functional imaging techniques. (cambridge.org)
  • In medicine, they are used in diagnostic techniques like Positron Emission Tomography (PET) scans, and in therapeutic interventions like radiation therapy to treat cancer. (skyheadlines.com)
  • This paper aimed to review the literature regarding the application of positron emission tomography in head and neck cancer, including its impact in the diagnosis, image principles, radiotracers, positron emission tomography / computed tomography image fusion and other advantages. (bvsalud.org)
  • It could be observed that the use of positron emission tomography improves the diagnostic approach of the patients, especially when positron emission tomography is allied to computed tomography. (bvsalud.org)
  • As it provides physiological information, positron emission tomography also benefits the prognostic and reduces the morbidity related to the treatment of head and neck cancer. (bvsalud.org)
Scan1
  • A single SPECT scan in Bangalore can cost between Rs. (kiranpetct.com)
Diagnostic1
Penetrate tissue1
  • Unlike visible light photons, these gamma- and x-ray photons can penetrate tissue unscattered and therefore can be used in vivo for high resolution microscopy. (ca.gov)
Ultrasound1
  • On the other hand, MBI, also referred as breast-specific gamma imaging (BSGI), is an imaging protocol that has been shown in several clinical studies to be more effective than mammography or ultrasound for detecting breast cancer, especially in women with dense breasts. (healthimaginghub.com)
Camera11
  • CONCLUSIONS: It was possible to transition from a conventional gamma camera to the Starguide system as part of the clinical routine, with acceptable image quality. (lu.se)
  • Images from the Starguide system were deemed to be at least as good as those from a conventional gamma camera. (lu.se)
  • The gamma probes offer an upgrade option for three-dimensional (3D) tumor imaging and navigation with SurgicEye's (Munich, Germany) declipseSPECT (single photon emission computed tomography ) camera. (healthimaginghub.com)
  • To acquire SPECT images, the gamma camera is rotated around the patient. (chemeurope.com)
  • With imaging, doctors can see where the tracer collects and gives off radiation, which is detected by special scanners or cameras, such as a gamma camera. (msdmanuals.com)
  • The gamma camera was then developed into a single photon emission computed tomography (SPECT) by David E. Kuhl and Roy Edwards. (modernloveok.com)
  • The gamma camera consists of detector which picks up "the high-energy photons emitted by the patient, estimating the photon energy and location of interaction" (Khoshakhlagh, Islamian, Abedi, & Mahmoudian, 2015). (modernloveok.com)
  • Methods: A gamma camera simulation based on the Monte Carlo method was performed to produce SPECT images. (elsevierpure.com)
  • SPECT scanning was performed with a triple head gamma camera equipped with ultrahigh resolution parallel hole collimators. (avmi.net)
  • 7,8 Through sequential image acquisition, the gamma camera works with a computer to evaluate cardiac function and perfusion. (cadth.ca)
  • The organ and tissue doses are calculated based on biokinetic models that are obtained by means of repeated gamma camera or PET-camera measurements of the distribution of the activity in the body and models of various physiological processes. (lu.se)
Isotopes1
  • Due to the difference in photon energy from different isotopes, more than one process can be monitored simultaneously. (lu.se)
Dimer2
  • Two 99mTc-labeled single photon emission computed tomography (SPECT) cerebral blood flow tracers-ethylcysteinate dimer (ECD) and hexamethylpropylene amine oxime (HMPAO)-are commonly used in human medicine and have been used previously in dogs but intrasubject comparison of both tracers in dogs is lacking. (avmi.net)
  • Therefore, we conducted a surveillance to integrate the clinical presentations and Tc-99 m ethyl cysteinate dimer single-photon emission computed tomography (Tc-99 m-ECD SPECT) among patients with low Cbl status. (biomedcentral.com)
Physiological1
  • In combination with imaging of the morphology using a CT (Computed Tomography) fused images can be produced displaying the physiological process and the morphology in the same image simultaneously. (lu.se)
Form of ionising electromagnetic1
99mTc1
  • The microscope is based on imaging low-energy gamma-ray and x-ray photons that result from the decay of radioactive labels such as 111In and 99mTc mentioned above. (ca.gov)
Probe3
  • 3. Alex J.C., Krag D.N. The Gamma-Probe-Guided Resection of Radiolabeled Primary. (fmbafmbc.ru)
  • For each of three physician evaluators, the time required to localize lymph node targets was recorded (1) using the gamma probe alone and (2) using the gamma probe while wearing the AR headset. (stanfordhealthcare.org)
  • In addition, the surface localization accuracy when using the AR headset was evaluated by measuring the misalignment between the locations visually marked by the evaluators and the ground truth locations identified using UV stimulation of the ink at the site of the nodes.RESULTS: For all three evaluators, using the AR headset significantly reduced the time to detect targets (P=0.012, respectively) compared to using the gamma probe alone. (stanfordhealthcare.org)
Sensitivity1
SPECT-CT3
  • At Synergy Radiology we use Single Photon Emission Computed Tomography (SPECT- CT). (synrad.com.au)
  • SPECT-CT combines single photon emission computed tomography (SPECT) gamma cameras and computed tomography (CT) into one imaging system. (itnonline.com)
  • In addition, biodistribution of 131 I-Hyp was assessed with in vivo single-photon emission computed tomography-computed tomography (SPECT-CT) imaging, in vitro autoradiography, fluorescent microscopy, and gamma counting. (oncotarget.com)
Decay2
  • Radioactive decay is a random process at the level of single atoms: it is impossible to predict when one particular atom will decay. (wikipedia.org)
  • SPECT imaging uses photons emitted from radioactive decay, for photon energies 25-350 keV. (lu.se)
Tracer2
  • It is a gamma ray emitting isotope used in radioactive isotope medical tests, for example as a radioactive tracer that medical equipment can detect in the body. (chemeurope.com)
  • Single-photon emission computed tomography (SPECT) images also demonstrated target specific binding of the tracer at 4- and 24-h post injection. (edu.pl)
Imaging4
  • A Novel SPECT microscopy system for 3D imaging of single stem cells in vivo Individual stem cells can be visualized within the body - "in vivo" by genetically engineering the cells to absorb a contrast agent when the agent is present within the body. (ca.gov)
  • and 2) development of new imaging hardware, a gamma microscope, to visualize the individual stem cells in vivo. (ca.gov)
  • Finally, the GM-I and Cedars-Sinai research team has developed a technology development strategy that translates the gamma microscope technology, useful for in vitro and in vivo mouse imaging, into future clinical applications involving the monitoring of stem cells and their progeny as well as the biological processes associated with the differentiation stages. (ca.gov)
  • Dilon's surgical imaging products, the Navigator probes, are one of the most widely used gamma probes for cancer surgery. (healthimaginghub.com)
Detector1
  • Although the drawings show only a single detector module having a 4×4 pixel matrix for the sake of simplicity, those skilled in the art will appreciate that larger pixel matrices may be used, such as 16×16 or larger up to many hundreds, comprising multiple detector modules tiled together. (justia.com)
Radioactive isotope1
Clearance1
  • A single-centre study has previously reported the use of pulmonary radioaerosol mucociliary clearance (MCC) in the diagnosis of PCD [ 10 ]. (ersjournals.com)
Clinical routine1
  • This result supports the use of the novel gamma cameras in clinical routine practices also considering the improvements in acquisition time and radiation exposure reduction. (cnr.it)
Energy1
  • The isotope is also of a very low energy level for a gamma emitter. (chemeurope.com)
Vivo1
  • The research group at Gamma Medica-Ideas is responsible for developing the microscope that is capable of visualizing individual stem cells in vivo. (ca.gov)
Images1
  • Objective: To examine the impact of acquisition time on Lutetium-177 ( 177 Lu) single-photon emission computed tomography (SPECT) images using Monte Carlo simulation. (elsevierpure.com)
Test3
  • The test is called single photon emission computed tomography (SPECT). (kiranpetct.com)
  • For the eight-noded element both 2 boo, (reduced') and 3 3 (standard') gaussian quadrature satisfy the patch test, CHAPTER 3 A First Look at Joins In the previous chapter, we looked at how to retrieve subsets of rows andor columns from a single table. (forex-consultant.com)
  • 100 Gbps) high-channel-count (≥ 256) time-to-digital advanced processor (HiTAP) architecture will be developed for use in single-photon-counting free-space optical communications systems and test beds. (nasa.gov)
Patients2
  • This technique was equally efficacious in patients who had undergone gamma knife radiosurgery and in those who had received XRT. (psu.edu)
  • Overall, 21 hip RSVs were performed: 8 patients had a single RSV, 2 patients had an RSV of both hips, 3 patients had 2 RSVs of the same hip and 1 patient had 2 RSVs of the right hip and 1 RSV of the left hip. (termedia.pl)
Cameras1
  • Our dual-head SPECT system is composed of gamma cameras based on the Hamamatsu H13700 position-sensitive photomultiplier tube (PSPMT). (researchsquare.com)
Technology1
Energetic2
  • [1] These emissions are considered ionizing radiation because they are energetic enough to liberate an electron from another atom. (wikipedia.org)
  • These gamma radiation are so energetic that they can dislodge electrons from their atomic orbits, which can potentially cause cellular and genetic damage. (skyheadlines.com)
Show1
  • In particular, techniques like single photon emission computed tomography (SPECT) show high potential, which is usually limited by spatial resolution. (researchsquare.com)
Medical2
  • the gamma radioactive sources market is divided into medical, industrial, agriculture, scientific research and others. (businessresearchinsights.com)
  • For instance, in medical procedures, the benefits of using gamma radiation are carefully weighed against the potential risks, and efforts are made to minimize exposure. (skyheadlines.com)
Processes1